How to upgrade Google Chrome on Ubuntu

Tested on Ubuntu 16.04 LTS (and should work also on 18.04 LTS and other non-LTS versions):

wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
# on 32-bit system remove [arch=amd64] from:
sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
sudo apt-get update
sudo apt-get upgrade google-chrome-stable

Inspired by this article.